const EventBus = require("../template")

function testEventBusComplexScenarios() {
  console.log(
    "1. 复杂事件系统测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 复杂事件系统
      const events = {
        'user:login': [],
        'user:logout': [],
        'user:profile:update': [],
        'admin:user:delete': [],
        'system:error': []
      }
      
      // 订阅事件
      Object.keys(events).forEach(event => {
        eventBus.on(event, (data) => {
          events[event].push(data)
        })
      })
      
      // 发布事件
      eventBus.emit('user:login', { userId: 1, username: 'test' })
      eventBus.emit('user:logout', { userId: 1 })
      eventBus.emit('user:profile:update', { userId: 1, field: 'email' })
      eventBus.emit('admin:user:delete', { userId: 1, adminId: 2 })
      eventBus.emit('system:error', { code: 500, message: 'Internal error' })
      
      // 验证事件处理
      return events['user:login'].length === 1 &&
             events['user:logout'].length === 1 &&
             events['user:profile:update'].length === 1 &&
             events['admin:user:delete'].length === 1 &&
             events['system:error'].length === 1
    })()
  )

  console.log(
    "2. 事件总线动态负载测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 动态负载测试
      const loadPatterns = [
        { operation: 'subscribe', event: 'load1', count: 100 },
        { operation: 'emit', event: 'load1', count: 100 },
        { operation: 'subscribe', event: 'load2', count: 200 },
        { operation: 'emit', event: 'load2', count: 200 },
        { operation: 'unsubscribe', event: 'load1', count: 50 },
        { operation: 'emit', event: 'load1', count: 50 }
      ]
      
      let totalOperations = 0
      loadPatterns.forEach(pattern => {
        if (pattern.operation === 'subscribe') {
          for (let i = 0; i < pattern.count; i++) {
            eventBus.on(pattern.event, () => totalOperations++)
          }
        } else if (pattern.operation === 'emit') {
          for (let i = 0; i < pattern.count; i++) {
            eventBus.emit(pattern.event)
          }
        } else if (pattern.operation === 'unsubscribe') {
          // 模拟取消订阅
          totalOperations -= pattern.count
        }
      })
      
      return totalOperations > 0
    })()
  )

  console.log(
    "3. 事件总线边界条件测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 边界条件测试
      const boundaryTests = [
        () => eventBus.on('', () => {}), // 空事件名
        () => eventBus.on('test', null), // null回调
        () => eventBus.emit(''), // 空事件名发布
        () => eventBus.off('nonexistent', () => {}), // 不存在的事件
        () => eventBus.listenerCount('nonexistent'), // 不存在的事件计数
        () => eventBus.removeAllListeners('nonexistent') // 不存在的事件移除
      ]
      
      let successCount = 0
      boundaryTests.forEach(test => {
        try {
          test()
          successCount++
        } catch (error) {
          // 预期某些操作会失败
        }
      })
      
      return successCount >= 3 // 至少3个操作成功
    })()
  )

  console.log(
    "4. 事件总线错误恢复测试:",
    (() => {
      const eventBus = new EventBus()
      
      try {
        // 错误恢复测试
        let errorCount = 0
        let successCount = 0
        
        eventBus.on('error', () => {
          throw new Error('Test error')
        })
        
        eventBus.on('success', () => {
          successCount++
        })
        
        // 触发错误事件
        try {
          eventBus.emit('error')
        } catch (error) {
          errorCount++
        }
        
        // 触发成功事件
        eventBus.emit('success')
        
        return errorCount === 1 && successCount === 1
      } catch (error) {
        return false
      }
    })()
  )

  console.log(
    "5. 事件总线内存管理测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 内存管理测试
      const eventCount = 1000
      
      // 添加大量事件
      for (let i = 0; i < eventCount; i++) {
        eventBus.on(`event${i}`, () => {})
      }
      
      const initialCount = eventBus.listenerCount()
      
      // 移除一半事件
      for (let i = 0; i < eventCount / 2; i++) {
        eventBus.removeAllListeners(`event${i}`)
      }
      
      const finalCount = eventBus.listenerCount()
      
      return initialCount === eventCount &&
             finalCount === eventCount / 2
    })()
  )

  console.log(
    "6. 事件总线并发操作测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 并发操作测试
      const operations = [
        () => eventBus.on('concurrent', () => {}),
        () => eventBus.emit('concurrent'),
        () => eventBus.on('concurrent', () => {}),
        () => eventBus.emit('concurrent'),
        () => eventBus.off('concurrent', () => {}),
        () => eventBus.emit('concurrent')
      ]
      
      operations.forEach(op => op())
      
      // 验证并发操作结果
      const listenerCount = eventBus.listenerCount('concurrent')
      
      return listenerCount >= 0
    })()
  )

  console.log(
    "7. 事件总线复杂查询测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 添加复杂事件
      const events = ['event1', 'event2', 'event3', 'event4', 'event5']
      events.forEach(event => {
        eventBus.on(event, () => {})
      })
      
      // 复杂查询测试
      const eventNames = eventBus.eventNames()
      const totalListeners = eventBus.listenerCount()
      const hasListeners = eventBus.hasListeners('event1')
      
      return eventNames.length === 5 &&
             totalListeners === 5 &&
             hasListeners === true
    })()
  )

  console.log(
    "8. 事件总线状态一致性测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 状态一致性测试
      const operations = [
        () => eventBus.on('state', () => {}),
        () => eventBus.on('state', () => {}),
        () => eventBus.listenerCount('state'),
        () => eventBus.off('state', () => {}),
        () => eventBus.listenerCount('state'),
        () => eventBus.removeAllListeners('state'),
        () => eventBus.listenerCount('state')
      ]
      
      const results = operations.map(op => op())
      
      return results[2] === 2 && // 添加2个监听器后
             results[4] === 1 && // 移除1个监听器后
             results[6] === 0 // 移除所有监听器后
    })()
  )

  console.log(
    "9. this上下文复杂场景测试:",
    (() => {
      const complexObj = {
        multiplier: 3,
        processComplex: function(events) {
          const eventBus = new EventBus()
          events.forEach(event => {
            eventBus.on(event, () => {})
          })
          return eventBus.listenerCount() * this.multiplier
        }
      }
      
      const events = ['event1', 'event2', 'event3']
      return complexObj.processComplex(events) === 9 // 3*3=9
    })()
  )

  console.log(
    "10. 复杂对象this绑定复杂场景测试:",
    (() => {
      const complexConfigObj = {
        config: { threshold: 2 },
        processWithConfig: function(events) {
          const eventBus = new EventBus()
          events.forEach(event => {
            eventBus.on(event, () => {})
          })
          return eventBus.listenerCount() >= this.config.threshold
        }
      }
      
      const events = ['event1', 'event2', 'event3']
      return complexConfigObj.processWithConfig(events) === true
    })()
  )

  console.log(
    "11. 事件总线复杂操作序列测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 复杂操作序列
      const operationSequence = [
        { op: 'on', event: 'seq1', callback: () => {} },
        { op: 'on', event: 'seq2', callback: () => {} },
        { op: 'emit', event: 'seq1' },
        { op: 'off', event: 'seq1', callback: () => {} },
        { op: 'emit', event: 'seq2' },
        { op: 'removeAll', event: 'seq2' },
        { op: 'emit', event: 'seq1' }
      ]
      
      let successCount = 0
      operationSequence.forEach(seq => {
        try {
          if (seq.op === 'on') {
            eventBus.on(seq.event, seq.callback)
          } else if (seq.op === 'emit') {
            eventBus.emit(seq.event)
          } else if (seq.op === 'off') {
            eventBus.off(seq.event, seq.callback)
          } else if (seq.op === 'removeAll') {
            eventBus.removeAllListeners(seq.event)
          }
          successCount++
        } catch (error) {
          // 某些操作可能失败
        }
      })
      
      return successCount >= 5 // 至少5个操作成功
    })()
  )

  console.log(
    "12. 事件总线复杂场景综合测试:",
    (() => {
      const eventBus = new EventBus()
      
      // 综合复杂场景
      const scenarios = [
        // 场景1: 大量事件订阅
        () => {
          for (let i = 0; i < 100; i++) {
            eventBus.on(`scenario${i}`, () => {})
          }
          return eventBus.listenerCount() === 100
        },
        // 场景2: 事件发布
        () => {
          let count = 0
          eventBus.on('scenario', () => count++)
          eventBus.emit('scenario')
          return count === 1
        },
        // 场景3: 事件取消订阅
        () => {
          const callback = () => {}
          eventBus.on('scenario', callback)
          eventBus.off('scenario', callback)
          return eventBus.listenerCount('scenario') === 0
        },
        // 场景4: 事件清理
        () => {
          eventBus.on('scenario', () => {})
          eventBus.removeAllListeners('scenario')
          return eventBus.listenerCount('scenario') === 0
        },
        // 场景5: 最终验证
        () => {
          const totalListeners = eventBus.listenerCount()
          return totalListeners >= 0
        }
      ]
      
      const results = scenarios.map(scenario => scenario())
      
      return results.every(result => result === true)
    })()
  )
}

testEventBusComplexScenarios()
